Systems

 

 

Integrated electrical and low-voltage systems of all types—inside and outside a building—encompass the range of work that electrical contractors do. The articles in this section highlight different types of work, from security, fire and life safety, to traditional electrical power and distribution, to lighting, cabling and more. 

Renovating commercial buildings that require fire alarm system updates presents many challenges. First, the upgrade that is designed and installed must comply with NFPA 72, National Fire Alarm and Signaling Code. The challenge comes from determining which edition should be followed.

Ideal Networks LanTEK III certifier

Commercial datacom networks must be certified that they are correctly installed and meet industry performance standards. That makes certification testers a basic tool for installers, and manufacturers must plan ahead to have test instruments available as standards change.

It seems like every decade or so, elementary school educators employ a new way of teaching math. When parents try to help, they are greeted with “That’s not how we do it.” Yet the fundamental laws of mathematics haven’t changed since the time of the ancient Greek and Persian mathematicians.


Automation systems have served a variety of benefits to five-star hotels over the past decade. Recently, moderately priced hotels have adopted the technology.

More on Systems

 
Airport Security Moves to Exits
by Staff |

Airport travelers are accustomed to scrutiny at screening checkpoints. Metal detectors and security personnel posted at the concourse entrance have been a fact of life for years.


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The Makeover Continues

After 9/11, our nation’s security was scheduled for an extreme makeover. The transformation is ongoing.


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The Good Side of Government Intervention

A brief history of how fire alarm codes came about Many people are blissfully unaware of why we have fire alarm system codes and standards.


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Boom or Bust?

Are there jobs for you in the nuclear power market? According to the World Nuclear Association, a recent study determined that nuclear energy incurs about one-tenth of the financial cost of coal to produce electricity.


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Circuit Breakers on Delta Circuits, Flexible Metal Conduits and More

CODE CITATIONS Article 100 Definitions Article 210 Branch Circuit Article 220 Branch Circuit, Feeder and Service Calculations Article 240 Overcurrent Protection Article 250 Grounding Article 310 Conductors for General Wiring Article 334 Nonmetallic Sheathed Cable; Types NM, NMC and NMS Article 404 S


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Here Comes the Sun

Outdoor solar lighting has a bright future With little fanfare, solar lighting systems are being installed on a growing number of projects, and lighting powered by sunlight has quietly evolved into a mature technology with widespread acceptance.


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Plenum vs. Non-Plenum

A minor decision that can prove costly Cabling choices are abundant; there are so many options these days that it is almost impossible to list them without leaving a few out.


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